/*
 * Copyright (C) 2020 LingmoSoft Co., Ltd.
 *
 * Authors:
 *  Kobe Lee    xiangli@ubuntulingmo.com/kobe24_lixiang@126.com
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __DECPCAP_H
#define __DECPCAP_H

#include <stdlib.h>
#include <stdio.h>
#include <pcap.h>

#define DP_ERRBUF_SIZE PCAP_ERRBUF_SIZE

/* definitions */

enum dp_packet_type {
	dp_packet_ethernet,
	dp_packet_ppp,
	dp_packet_sll,
	dp_packet_ip,
	dp_packet_ip6,
	dp_packet_tcp,
	dp_packet_udp,
	dp_n_packet_types
};

/*struct dp_header {
 * pcap
};*/
typedef struct pcap_pkthdr dp_header;

typedef int (*dp_callback)(u_char *, const dp_header *, const u_char *);

struct dp_handle {
	pcap_t * pcap_handle;
	dp_callback callback [dp_n_packet_types];
	int linktype;
	u_char * userdata;
	int userdata_size;
};

/* functions to set up a handle (which is basically just a pcap handle) */

struct dp_handle * dp_open_live(const char * device, int snaplen, int promisc, int to_ms, char * errbuf);
struct dp_handle * dp_open_offline(char * fname, char * ebuf);

/* functions to add callbacks */

void dp_addcb (struct dp_handle * handle, enum dp_packet_type type, dp_callback callback);

/* functions to parse payloads */

void dp_parse (enum dp_packet_type type, void * packet);

/* functions to start monitoring */

int dp_dispatch (struct dp_handle * handler, int count, u_char *user, int size);

/* functions that simply call libpcap */

int dp_datalink(struct dp_handle * handle);

int dp_setnonblock (struct dp_handle * handle, int i, char * errbuf);

char * dp_geterr (struct dp_handle * handle);

#endif
